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multiple command bind to a single key stroke
From: |
Jaeyoun Chung |
Subject: |
multiple command bind to a single key stroke |
Date: |
Sun, 6 Jan 2008 21:10:54 -0800 (PST) |
User-agent: |
G2/1.0 |
here's simple define-key* to map multiple commands into a single
keystroke.
dropdown-list packages are attached.
;;; define-key* command follows
(require 'cl)
(defun define-key* (keymap key def)
(define-key keymap key (combine-command def (lookup-key keymap
key))))
(defun combine-command (def defs)
(cond ((null defs) def)
((and (listp defs)
(eq 'lambda (car defs))
(= (length defs) 4)
(listp (fourth defs))
(eq 'command-selector (car (fourth defs))))
(unless (member `',def (cdr (fourth defs)))
(setcdr (fourth defs) (nconc (cdr (fourth defs)) `(',def))))
defs)
(t
`(lambda () (interactive) (command-selector ',defs ',def)))))
(require 'dropdown-list)
(defvar command-selector-last-command nil)
(defun command-selector (&rest candidates)
(if (and (eq last-command this-command) command-selector-last-
command)
(call-interactively command-selector-last-command)
(let* ((candidate-strings
(mapcar (lambda (candidate)
(format "%s" (if (symbolp candidate)
candidate
(let ((s (format "%s" candidate)))
(if (>= (length s) 7)
(concat (substring s 0 7) "...")
s)))))
candidates))
(selection (dropdown-list candidate-strings)))
(when selection
(let ((cmd (nth selection candidates)))
(call-interactively cmd)
(setq command-selector-last-command cmd))))))
here is dropdown-list.el sources:
;;; dropdown-list.el --- dropdown menu interface
;; Copyright (C) 2008 Jaeyoun Chung
;; Author: address@hidden
;; Keywords: convenience
;;
;; overlay code stolen from company-mode.el
;;
;;; Code:
(defface dropdown-list-face
'((t :inherit default
:background "lightyellow"
:foreground "black"))
"*Bla."
:group 'dropdown-list)
(defface dropdown-list-selection-face
'((t :inherit dropdown-list
:background "purple"))
"*Bla."
:group 'dropdown-list)
(defvar dropdown-list-overlays nil)
(defun dropdown-list-hide ()
(while dropdown-list-overlays
(delete-overlay (pop dropdown-list-overlays))))
(defun dropdown-list-put-overlay (beg end &optional prop value prop2
value2)
(let ((ov (make-overlay beg end)))
(overlay-put ov 'window t)
(when prop
(overlay-put ov prop value)
(when prop2
(overlay-put ov prop2 value2)))
ov))
(defun dropdown-list-line (start replacement &optional no-insert)
;; start might be in the middle of a tab, which means we need to
hide the
;; tab and add spaces
(let ((end (+ start (length replacement)))
beg-point end-point
before-string after-string)
(goto-char (point-at-eol))
(if (< (current-column) start)
(progn (setq before-string
(make-string (- start (current-column)) ? ))
(setq beg-point (point)))
(goto-char (point-at-bol)) ;; Emacs bug, move-to-column is wrong
otherwise
(move-to-column start)
(setq beg-point (point))
(when (> (current-column) start)
(goto-char (1- (point)))
(setq beg-point (point))
(setq before-string (make-string (- start (current-
column)) ? ))))
(move-to-column end)
(setq end-point (point))
(let ((end-offset (- (current-column) end)))
(when (> end-offset 0)
(setq after-string (make-string end-offset ?b))))
(when no-insert
;; prevent inheriting of faces
(setq before-string (when before-string
(propertize before-string 'face
'default)))
(setq after-string (when after-string
(propertize after-string 'face 'default))))
(let ((string (concat before-string
replacement
after-string)))
(if no-insert
string
(push (dropdown-list-put-overlay beg-point end-point
'invisible t
'after-string string)
dropdown-list-overlays)))))
(defun dropdown-list-start-column (display-width)
(let ((column (mod (current-column) (window-width)))
(width (window-width)))
(cond ((<= (+ column display-width) width)
column)
((> column display-width)
(- column display-width))
((>= width display-width)
(- width display-width))
(t
nil))))
(defun dropdown-list-move-to-start-line (candidate-count)
(decf candidate-count)
(let ((above-line-count (save-excursion (- (vertical-motion (-
candidate-count)))))
(below-line-count (save-excursion (vertical-motion candidate-
count))))
(cond ((= below-line-count candidate-count)
t)
((= above-line-count candidate-count)
(vertical-motion (- candidate-count))
t)
((>= (+ below-line-count above-line-count) candidate-count)
(vertical-motion (- (- candidate-count below-line-count)))
t)
(t
nil))))
(defun dropdown-list-at-point (candidates &optional selidx)
(dropdown-list-hide)
(let* ((lengths (mapcar #'length candidates))
(max-length (apply #'max lengths))
(start (dropdown-list-start-column (+ max-length 3)))
(i -1)
(candidates (mapcar* (lambda (candidate length)
(let ((diff (- max-length length)))
(propertize
(concat (if (> diff 0)
(concat candidate (make-string
diff ? ))
(substring candidate 0 max-length))
(format "%3d" (+ 2 i)))
'face (if (eql (incf i) selidx)
'dropdown-list-selection-face
'dropdown-list-face))))
candidates lengths)))
(save-excursion
(and start
(dropdown-list-move-to-start-line (length candidates))
(loop initially (vertical-motion 0)
for candidate in candidates
do (dropdown-list-line (+ (current-column) start) candidate)
while (/= (vertical-motion 1) 0)
finally return t)))))
(defun dropdown-list (candidates)
(let ((selection) (temp-buffer))
(save-window-excursion
(unwind-protect
(let ((candidate-count (length candidates))
done key selidx)
(while (not done)
(unless (dropdown-list-at-point candidates selidx)
(switch-to-buffer (setq temp-buffer (get-buffer-create "
*selection*")) 'norecord)
(delete-other-windows)
(delete-region (point-min) (point-max))
(insert (make-string (length candidates) ?\n))
(goto-char (point-min))
(dropdown-list-at-point candidates selidx))
(setq key (read-key-sequence ""))
(cond ((and (stringp key) (>= (aref key 0) ?1) (<= (aref key 0)
(+ ?0 (min 9 candidate-count))))
(setq selection (- (aref key 0) ?1)
done t))
((member key '("" [up]))
(setq selidx (mod (+ candidate-count (1- (or selidx 0)))
candidate-count)))
((member key '("" [down]))
(setq selidx (mod (1+ (or selidx -1)) candidate-count)))
((member key '("")))
((member key '("
" [return]))
(setq selection selidx
done t))
(t
(setq done t)))))
(dropdown-list-hide)
(and temp-buffer (kill-buffer temp-buffer)))
;; (when selection
;; (message "your selection => %d: %s" selection (nth
selection candidates))
;; (sit-for 1))
selection)))
(provide 'dropdown-list)
;;; dropdown-list.el ends here
- multiple command bind to a single key stroke,
Jaeyoun Chung <=